Filter
Top Products
provides a palette of fully saturated colors whose colors are
similar to those of a plotter’s pen colors. The palette is
nonprogrammable, and is intended for simple printing of
items such as bar and pie charts. For applications requiring
different or more specific colors, the printer offers the PCL
Imaging and HP-GL/2 Imaging Modes. The palette colors
in these two modes can be modified to provide the desired
result.
When choosing color for a particular application, the
Color LaserJet printer provides device-dependent and
device-independent color (the DeskJet 1200C supports
only device-dependent color). Device-independent color
provides accurate color matching based on an absolute color
standard. It is preferred when users want a precise color to
match the output from another device or to match the color
on an existing page.
Besides providing device-independent color for precise color
matching, the HP printers can modify color to compensate
for various characteristics. The Color LaserJet printer
supports the following methods of modifying color (the
DeskJet 1200C printer supports halftone algorithms and
gamma correction, but not color lookup tables or the
Viewing Illuminant command).
Halftone render algorithms determine how colors are
rendered using the printers available colors. Halftone
algorithms can be used to change apparent resolution,
change the texture of images, reduce the number of
colors, and change a color image to monochrome.
Color lookup tables can remap colors to compensate for
various differences in input data, such as unwanted color
casts caused by unbalanced photographic light sources.
Gamma correction provides a way to adjust for color
differences in display monitors so that the display more
closely matches the printed output.
Since the appearance of colors changes under different
viewing light sources, the Viewing Illuminant command
allows the application to modify output color based on
the light source used to view the printed page.
1-2 Color Printing Overview1-2 Color Printing Overview